Furnace



March 7, 1933. G. LEIMAN 1,900,570

FURNACE Filed'Nov. 2, 1929 F/ b l. 12 L F 972.

- INVENTOR 2 M ATTORNEYS Patented Mar. 7, 1933 UNITED STATES PATENTFOIF'FITCE,

ousravn LEIMAILOF NEW YORK, a. Y., nssronoa'ro LEIMAN 330s. me; orNEWARK,

. NEW JERSEY, A coaronnrron ornnw JERSEY ruarmcn Application filedNovemberfl, 1929. Serial No. 404,284;'

This invention relates to improvements in furnaces and more particularlyto boilers of furnaces having oil burningdevices incorporated therewith.7

? One object of the inventioniis to provide an attachment of hollowtubular formation capable of being applied to a boiler above the oilburning device and disposed in position to feed a column of air to thecombustion chamber to increasethe volume of heat created in the chamberand reduce the noise caused by the Operation of the oil burner.

Another object is to provide a hollow tubular attachment having meansapplied thereto for regulating the volume of air passing therethrough.

Another object is to provide a hollow tubular attachment disposedin aninclined position in the combustion chamberand having air towardtheflame of the oil burner, thereby obtaining a balanced mixture of the airand fuel in the combustion chamber and as sistinginv the combustion ofthe fuel emitted from the oil burnenf 1 Another object is to provide'certainimprovements in the form, construction and arrangement of "theparts whereby the above named and other objects may'efi'ectively beattained. 1 i

A practical embodiment of my invention is represented in theaccompanying drawing, in which 'Fig. .1 represents a front elevation ofa boiler having my improved attachment applied thereto and showing anozzle of the oil buring device in section. I

Fig. 2 represents a side elevation of the same, partly in section. Fig.'3 represents a plan view, on

larged scale, of .my attachment.

Fig, l'xrepresents a front elevation of the same. i

p 7 Fig; 5 represents a longitudinal vertical section taken in the planeof the line VV bottom .plan

its lower wall cut away to direct a current of.

tical section of my attachment having a modifiedform of shutter pivotedtherein;

The furnace maybe of any well-known or approved constructionhavingaboiler; d'e-. noted by 1, a base 2 for supporting the boilerand acombustion chamber 3 therein. The boiler is providedwith the usual cleanout doors 4, 5,"and thebase has a'door6. The water inlet pipes for theboiler are denoted by 7, 8, while-the outlet pipes are denoted by 9,10.- A smoke pipe ll i's secured to the top of the boiler in the usualmanner.

An oil burner 12 of anywell-known or.- approved type'having a nozzle 13is disposed l in position with the nozzle projecting a through a hole 14in the door 6, from which nozzle the fuel is ignited anddirected intothe combustion chamber Air from the exterior of the boiler is allowed topass into the combustion chamber through a hollow tubular membercomposed of an upper wall 15, a lower wall 16, andside walls 17, 18; Thewalls are preferably disposed in rec-I tangular form in cross section,and provided at one end, with aperipheral flange 19, by which flange themember is secured in an opening 20 in the boiler. 1. :Themember' isinclined downwardly in-andi toward'the rear of the combustion chamber3,so as .to direct the column of air passing therethrough into contactwith the fuel. The lower wall 16 of the member has a portion cut awaytoform a V-shaped opening 21, the walls of which opening are widelyseparated'at 22 and con verge'to a point .23 located approximatelyabouttwo-thirds of the distance toward-the front of the member. Thisopening 21 allows a portion of the column of air passing through themember to be directed down wardly onto the ignited vfuel'emitted fromthe nozzle immediately below it.

. Asa means of restricting the column of. air passing through the hollowtubular member or to close the passage entirelyaI have shown in thepresent instance, a shutter 24 pivoted at 25 in the side walls. 17, 18and arranged to swing toward and away from the upper wall 15 and lowerwall 16, thereby controlling the volume of air passing throughthemember. The shutter 24 is closed 1 that the shutter will be allowedto swing, by.

gravity, on its pivot and cause the edge 29 to maintain its position incontact with the cam.

In Fig. 7 Ihave shown a. tubular member 31 having a shutter 32 pivotedat 33 and provided at its outer end'34 with a rod 35 screw threaded toreceive a weight 36 adjustably (secured, in position thereon. In thisform,

' the weight 36 may be moved on the rod-35 and the shutter 32 balancedso as to be held in position with the passage in the member normallyopen. The passage in the member may be closed by moving the weight 36 onits rod 35 toward'the shutter so that the inner end of the shutter willover-balance the outer end and weight, or a hook or other device, not

' shown, may be arranged to engage the outer iend-of the shutter tosupport the same.

While I have described the attachment for use in'conne'ction with-oilburning furnaces, Iwish it understood that the attachment may be usedadvantageously with a furnace having Tany gaseous or liquid burningdevice.

'It is obvious-that various changes may be resorted to in'the form,construction and arrangement of the several parts without departing fromthe spirit and scope of my invention, and hence I do not intend to belimited to the details herein shown and described except as the same areset forth in the claims. What I claim is: 1.. An air admissionattachment for veritical tubular boilers including a firebox, a

base therefor and an oil burning device in the base, said attachmentcomprising a straight open ended tubular member having the inner end ofone of its walls cut away to .form a. longitudinal opening therein andsecured to the boiler in position to project into the firebox foradmitting air thereinto, and a gravity operated shutter pivoted adjacentthe outer end of said member and adapted 7170 be moved toward and awayfrom said longitudinal opening in the wall of the memher by the draughtin the boiler to control the amount of air passing through the memher tothe firebox.

2. An air admission attachment for ver-.'

tical tubular boilers including a firebox, a base therefor and an oilburning device in the base, said attachment comprising a straight openended tubular-member having the inner end of one of its walls cut awayto form a to the firebox.

longitudinal opening therein and secured to the boiler in position toproject into the firebox for admitting air thereinto, a gravity operatedshutter pivoted adjacent the outer end of said member and adapted to bemoved toward and away from said longitudinal opening in the wall of themember by the draught in the boiler to control the amount of air passingthrough the member to the V firebox, saidshutterhaving its upper endextending outwardly from the tubular member, and a device arranged toengage said upper end of said shutter to hold it out of operation 3. Anair admission attachment for vertical tubular boilers includingafireboxj abas'e therefor-and an oilburning device in the base,said-attachment comprising a straight open ended tubular member havingthe inner'end 'of its lower wall cut away to form a longitudinal openingtherein and secured to the boiler .inposition to project intothe-firebox for admitting air thereinto, and a counter-balanced gravityoperated shutter pivoted adjacent the outer end'of said member andadapted to be moved'towardand' away from said longitudinal opening inthe lower 1 wall of the member by the draught in the boiler to controlthe amount of air passing through the member to the'firebox.

4. An air admission attachment for vertical tubular boilers including afirebox, a base therefor and 'anoil burning device in the base, saidattachment comprising a straight open ended tubular member having itslower wall cut away to. form a longitudinal open ingtherein and securedto the boiler in position to project intothe firebox for admitting airthereinto, a counterbalanced gravity op-- erated shutter pivotedadjacent the outer end ofsaid-member and adapted to be moved toward andaway from 'said longitudinal 7 opening in the lower wall of the memberby the draught in the boiler to control the amount of air passingthrough the member to the firebox, said shutter having its upper endextending outwardly from. the tubular member, and a device arrangedtoengage.

said upper end of said shutter to hold it out ofoperation. V

5. An air admission attachment for vertical tubular boilers includingafirebox, a base therefor and an oil burning device: in the base,

said attachment comprising a straight open ended tubularmember havingits lower wall cut away to form a longitudinalopeningprogressively-increasing in width toward'the inner end, said memberbeing secured to the boiler in position to project into the firebox foradmitting air thereinto, and a gravity.

operated shutter pivoted adjacentthe-outer end of said member andadapted to be moved-- by: the draught in the boiler to control theamount of air passing through-the member 6. An air admission attachmentfor vertical tubular boilers including a firebox, a base therefor and anoil burning device in the base, said attachment comprising a straightopen ended tubular member having its lower wall cut away to form alongitudinal opening progressively increasing in width toward the innerend, said member being secured to the boiler in position to project intothe firebox for admitting air thereinto, a gravity operated shutterpivoted adjacent the outer end of said member and adapted to be moved bythe draught in the boiler to control the amount of air passing throughthe member to the firebox, and a device for engaging said shutter tohold it out of operation.

7. An air admission attachment for vertical tubular boilers including afirebox, a base therefor and an oil burning device in the base, saidattachment comprising a straight open ended tubular member having itslower wall cut away to form a longitudinal opening progressivelyincreasing in width toward the inner end, said member being secured tothe boiler in position to project downwardly into the firebox foradmitting and directingv air toward the base, and a counterbalancedgravity operated shutter pivoted adjacent the outer end of said memberand adapted to be moved by the draught in the boiler to control theamount of air passing through the member in the firebox.

8. An air admission attachment for vertical tubular boilers including afirebox, a base therefor and an oil burning device in the base, saidattachment comprising a straight open ended tubular member having itslower wall cut away to form a longitudinal opening progressivelyincreasing in width toward the inner end, said member being secured tothe boiler in position to projectdownwardly into the firebox foradmitting and directing air toward the base, counterbalanced gravityoperated shutter pivoted adjacent the outer end of said member andadapted to be moved by the draught in the boiler to control theamountiof air passing through the t member in the firebox, and a devicefor engaging said shutter to hold it out of operation. 7

In testimony, that I claim the foregoing as my invention, I have signedmy name this 25th day of October, 1929.

GUSTAVE LEIMAN.

